US2043101A

US2043101A - Metal sput and method of attaching the same to sheet metal containers

Info

Publication number: US2043101A
Application number: US693089A
Authority: US
Inventors: Albert E Jesser
Original assignee: PITTSBURGH STEEL DRUM Co
Current assignee: PITTSBURGH STEEL DRUM Co
Priority date: 1933-10-11
Filing date: 1933-10-11
Publication date: 1936-06-02
Anticipated expiration: 1953-06-02

Description

A. E. JESSER METAL CONTAINERS June 2, 1936.

METAL SPUT AND METHOD OF ATTACHING THE SAME TO SHEET Filed Oct. 11., 1933 2 Sheets-Sheet l all 7'!" i INVENTOR. \wypw BY ATTORNEYS.

' June 2, 1936. A. E. JIESSER 2,043,101

METAL SPUT AND METHOD OF ATTACHING THE SAME TO SHEET METAL CONTAINERS Filed Oct. 11, 1933 2 Sheets-Sheet 2 if 3g -13 1 lballlii} 5% J 2/)... V 000 Z 1.5a l2 J5 J6 Q k I r? lrr 4 1Z4 f INVENTOR.

M6 BY 52 2V A TTORNEYS.

Patented June 2, 1936 METAL SPUT AND METHOD OF ATTACH- I ING THE SAME TO SHEET METAL CON- TAINERS Albert E. Jesser, Vandergrift, Pa., assignor to Pittsburgh Steel Drum Company, Pittsburgh, Pa., a corporation of Pennsylvania Application October 11, 1933, Serial No. 693,089

11 Claims. (01. 29-1482) This invention relates to improvements in metal bunghole fitting, for a barrel or drum, prefersputs or similar fittings, and to. the manner of ably made from a malleable metal as by forging. applying and securing the same to sheet metal The bunghole fitting illustrated includes an ancontainers and the like. nular ring body portion 2, it being understood For example, in making a metal drum, barrel that my invention may be applied to similar 5 or other container, 9. bung is necessary for filltypes of fittings without limitation as to dimening and emptying, and accordingly a separate sion or form. A central bore 3 is provldedof metal sput or bunghole fitting is employed. Such tapered form for receiving and irictionally refitting is generally of heavier metal than the taining a bung or cork, not shown.

body of the container and is therefore difiicult Extendin beyond O face dot the fitting A 10 of simple and inexpensive attachment. and preferably forming an extension 3a of the Welding has been generally employed for this bore of said fitting, I provide a cencentrlc thin purpose, but due to the relative thicknesses of annular lip ring portion the inner face the metals, difiiculty has been encountered in of which is prefe y tapered outwardly toward obtaining a perfect weld without impairing the its terminal edge. 15

strength of the sheet metal. 5 designates an annular concentric recess in My invention has in view to provide a simple the face a of the fitting, extending laterally inand eflicient mechanical joint between such a War f and pr y in P r m w hs i sput or fitting and the wall of h t t l face. A second concentric recess 6 is formed container, whereby to producealeak-proof sealed axially 0 t fi t Op inwardly 0f the connection therebetween; to provide a practical ss 5 a d extending i t sa d fitt n subfitting construction inexpensive to manufacture stantially at rig t angles t0 a d recess 5 and the and having novel inter-fitting and interlocking face a of the fitting, the inner wall of said recess engagement with the container wall; to pro- 5 being a continuation Of the outer surface '1) vide a connecting joint .between said sput and of the lip 7 container disposed fiush with the container wall Referring ow to s- 3 t0 5 inclusive, B desigto give unobstructed fluid passage therethrough; no es a portion of the wall of a sheet metal barand to provide a method of connecting and serel, drum or other. container to which the fitting curing said sput and container with a minimum A is to be appl e The initial tep in'the method number of operations. of my invention consists in forming a fitting- The invention may be more readily understood e e v p h in t e Sheet metal B. from the following description taken in connec- Thus in F15. d 8 designate a P 0 tion with the accompanying drawings, wherein: pu c d bending dies. As illustrated in Fig. 1 is a sectional perspective view of a sput dotted lines, the Sheet B is P d over the or bunghole fitting constructed in accordance relmded ring Portion 9 the Stationary d e 3, 35

with my invention; I where it is engaged by' the punch I0 of movable Fig. 2, a. view similar to Fig, 1 showing od die 1 to remove a central disk stamping c.

fied construction; Continued downward movement of the die 1 40 'Figs. 3 to 5 inclusive, sectional views reSpeC-o carries the sheet B over said rounded portion 40 tively illustrating the successive steps in the 9 to upset a r g Portion 911111111911 p H method of securing the fitting of Fig. 1 t a centric with the opening formed in said sheet, single walled sheet metal container or similar Sa d p Preferably being fi a y disposed at right article; angles to the body of the sheet. I

Fig. 6, a view similar to Fig. 5, showing the The diameter of the annular lip ll thus formed 45 final step in the method of securing the fitting is substantially equal to that of the axial recess of Fig. 2; 6 of the fitting A, and is designed to be entered Fig. 7, a sectional perspective view of a r i therein in the manner of Fig. 4, the width of lip forcing member employed in connection with the and recess being fashioned to de a $11118 fi form of Fig 2; a d When so positioned, the body of the sheet B con- 50 Fig. 8, a sectional view showing my invention tacts the face a of the fitting, and th 1 H employed in connection with a double walled is spaced from the terminal wall of the recess 6 sheet metal container or the like. a A strin gasket II o ot packin such as lead Referring to the drawings, A designates genor cement may be placed between said lip and 56 erally a metal sput or fitting, as for example, a the terminal wall of the recess if desired.

The fitting and sheet assembled in the manner stated are next placed between a pair of forming dies l3 and I4 as in Fig. 4, with the fitting lip 4 positioned over the mandrel portion l5 of stationary die l4.

Downward motion of the die l3 causes the fitting lip l to be forced and rolled outward in a direction parallel to the face a of said fitting into contact with the under side of the sheet B, and overlapping the base portion of the container lip ll. Continued closing movement of said die l3 efiects an off-setting of a portion l6 of the metal of the sheet B immediately over the recess 5 into the said recess, thereby displacing the lip ll of the sheet into tight sealing engagement with the terminal wall of its recess 6, or with the contained packing 12 when employed.

The off-setting of the portion 16 of the sheet into its recess 6 is accomplished by the pressure exerted by the dies upon the fitting lip 4, resulting in a lip-receiving depression I! being formed in the sheet B, conforming to and receiving the said lip I.

Therefore, as may be seen in Fig. 4, the final closing movement of the dies l3 and [4, provides an off-set and interlocking engagement between the sput or fitting A and the sheet B of simple and efiicientconstruction, the joint thereby provided being effectively clinched and sealed against leakage when subjected to severe hydraulic pressures.

It will be seen that the foregoing construction provides a joint which is disposed flush with the wall of the container or barrel, thereby preventing the trapping or clogging of its contents when emptying the same.

While the construction and method just described may be applied to various shapes and designs of containers, the fitting particularly referred to and illustrated in Fig. 1 is essentially for a single walled container, as for example, an oil drum or a metal beer barrel.

I have found, particularly in the construction and use of beer barrels, that it is desirable to provide additional reenforcing for the sput or bunghole fitting, due to the practice of employing a mechanical bung driving machine which seals the bungs with considerable force. Repeated application of such sealing force is apt to distort the metal of a single walled drum adjacent the bunghole, the resulting indentation causing a corresponding diminution of the gallonage or capacity of the barrel, or possible leakage rupture.

To obviate this condition, I have provided a modified form of fitting A, illustrated in Figs. 2 and 6, similar to that of Fig. 1 and including a second concentric thin annular lip l8 surrounding the bore 3 and extending from the face of the fitting opposite that having the protruding lip 4.

Cooperating with said lip 18 and the main shell B is a conical reenforcing member 19 formed of sheet metal and having a plane fiat upper flange 20 around a central contained opening 2|, said flange being adapted to lie over and contact the face of the fitting A about the lip IS.

The fitting is generally applied as before, with the exception that the upper die I 3a is formed with an annular groove 22 for contacting and bending the lip I! over and into holding engagement with the flange 20 of the member I9. As illustrated in Fig. 6, the entire bending and securing operation may be accomplished at the same time.

The base portion of the member I9 is preferably of such diameter as to extend annularly into close proximity with the annular hoops or ribs 23 generally formed in the wall of the barrel or drum B. 6

Therefore, by spot welding the member l9 about its base to the barrel B, as at 26, I have provided a reenforcement against inward as well as lateral displacement of the fitting or metal of the drum, the downward and inward force of a bung sealing machine being transmitted to the reenforcing hoops or ribs 23 through the member 19.

The present sput or fitting and method of applying the same may be employed in connection with a double walled drum or container, such a container, for example, as that shown in my pending application, filed July 19, 193-3, Serial No. 681,120.

In the event of such use, as illustrated in Fig. 8, the inner wall or container B" may be formed of relatively thin metal as aluminum, and the outer wall C of heavier sheet metal, spaced apart and having intervening insulation material D therebetween. The sput or fitting A" employed 25 may be formed of an aluminum forging and is altered as to dimension to receive the smaller gauge metal of the container B".

In additionpthe outer portion of the fitting A" is threaded at 24 to receive a nut or threaded collar 25, thereby securing the outer container C and fitting A" together.

I claim:

1. The herein described method of forming a connecting joint between a sheet metal container and a metal fitting, consisting in forming the fitting with an annular lip extending from one face thereof and a pair of recesses in said face, one of said recesses extending axially of the fitting and the other laterally of said face; forming an opening in the wall of the sheet metal container with an extending annular lip; entering said container lip in the axial recess of the fitting; forcing the fitting lip outwardly along and into contact with the container wall into overlapping relation with the base portion of said container lip; offsetting a portion of said container wall into the lateral recess of the fitting and forcing the container lip tightly into said axial recess; and forcing the fitting lip into said'oifset portion flush with the container wall.

2. The herein described method of forming a connecting joint between a sheet metal container and a metal fitting, consisting in forming the fitting with an annular lip extending from one face thereof and a pair of recesses in said face, one of said recesses extending laterally of said face and the other axially within the fitting at ,right angles to said lateral recess; forming an opening in the wall of the sheet metal container with an extending annular lip; entering said container lip in the axial recess of the fitting; forcing the fitting lip outwardly along and into contact with the container wall into overlapping relation with the base portion of said container' lip; offsetting a portion of said container wall into the lateral recess of the fitting and forcing the container lip tightly into said axial recess; and forcing the fitting lip into said ofiset portion flush with the container wall. 3. The herein described method of forming a connecting joint between a sheet metal container and a metal fitting, consisting in forming the fitting with an annular lip extending from-one face thereof and a pair of recesses in said face, 7

one of said recesses extending axially of the fitting and the other laterally of said face; forming an opening in the wall of the sheet metal container with an extending annular lip; entering said container lip in the axial recess of the fitting; forcing the fitting lip outwardly along and into contact with the container wall into overlapping relation with the base portion of said container lip and simultaneously forcing said container lip tightly into said axial recess by off-setting a portion of the container wall into the lateral recess of the fitting, and forcing the fitting lip into said offset portion flush with the container wall.

4. The combination with a sheet metal container having an opening in a wall thereof and an annular lip around said opening, of a metal sput having a face thereof engaging the container wall, said sput having an internal axially disposed annular recess receiving said lip, said sput also having a laterally disposed annular recess in said face extending outwardly from said axial recess, an off-set portion in the container wall entered within the lateral recess, and an extended annular lip on said sput entered in said container opening and disposed outwardly within said offset portion of the container wall at an angle to said container lip.

5. The combination with a sheet metal container having an opening in a wall thereof and an annular lip around said opening, of a metal sput having a face thereof engaging the container wall, said sput having an internal axially disposed annular recess receiving said lip, said sput also having a laterally disposed annular recess in said face extending outwardly from said axial recess, an offset portion in the container wall entered within the lateral recess, and an extended annular lip on said sput entered in said container opening and disposed outwardly within said offset portion flush with the container wall at an angle to said container lip.

6. The combination with a sheet metal oon tainer having an opening in a wall thereof and an annular lip around said opening,-of a metal sput surrounding said lip and having a face thereof engaging the container wall, said sput having a laterally disposed annular recess in said face and an internal axially extending annular recess disposed at right angles to said lateral recess, said axial recess receiving said container lip, an offset portion in the container wall entered within the lateral recess, and an extended annular lip on said sput entered in the container opening and disposed outwardly within said offset portion of the container wall at right angles to said container lip.

7. The combination with a sheet metal container having an opening in a wall thereof and an annular lip around said opening, of a metalsput surrounding said lip and having a face thereof engaging the container wall, said sput having a laterally disposed annular recess in said face and an internal axially extendingannular recess communicating with and disposed at right angles to said lateral recess, said axial recess receiving said container lip, an offset portion in the container wall entered within the lateral recess,

and an extended annular lip on said sput entered" in the container opening and disposed outwardly within said offset portion at right angles to said container lip flush with the container wall.

8. The combination with a sheet metal container having an opening in a wall thereof and an annular lip around said opening, of a metal sput entered within and extending outwardly beyond said opening, said sput having interlocking engagement with the container lip, a reenforclng member extending from the outer face of the sput and secured to the container wall at a point remote from said sput, and means on said sput for frictionally securing the reenforcing member thereto.

9. The combination with a sheet metal container having an opening in a wall thereof and an annular lip around said opening, of a metal sput entered within and extending outwardly beyond said opening, said sput having interlocking engagement with the container lip, a conical reenforcing member extending downwardly and outwardly from the outer face of the sput to the container wall, said member being secured to the container at a point remote from said sput, and an extended lip on said sput for frictionally securing the reenforcing member thereto.

10. A metal sput having a body portion formed with a flat face having a pair of internally formed annular recesses, one of said recesses extending axially within the body and the other recess disposed laterally within said face, andan annular lip extending outwardly beyond said body face for cooperation with the said recesses as and for the purpose described.

11. A one-piece metal sput having a body portion formed with a flat face having a pair of internally formed communicating annular recesses, one of said recesses extending axially within the body and the other recess disposed laterally within said face, and an annular lip extending outwardly beyond said body face for cooperation with the said recesses as and for the purpose described.

ALBERT E. JESSER.